DQL to find details based on workflow item

Based on this information, get the workflow details and document.
Started workitem: "4a000578800d9915" in docbase "ecmdocbase"

1. Get workflow id from package id
select r_workflow_id from dmi_workitem where r_object_id = '4a000578800d9915'

2. Get workflow details
select * from dm_workflow where r_object_id = '4d0005788004d500'

3. Get the document id from workflow package
select r_component_id from dmi_package where r_workflow_id = '4d0005788004d500'

4. get the document name
select * from dm_document where r_object_id = '0900057880210948'